IS 10357 : 1990 Indian Standard (Reaffirmed 2012) GENERALPURPOSEFURNACE[GPF(N-660)] CARBON BLACK- SPECIFICATION ( First Revisbfi ) UPC 661'666'4 : 678'4'046'2 @ BIS 1990 BUREAU MANAK OF BHAVAN, 9 INDIAN BAHADUR NEW DELHI STANDARDS SHAH 110002 Price Group 2 ZAFAR MARG June 1990 Rubber Products Sectional Committee, PCD 13 FOREWORD This Indian Standard ( First Revision ) was adopted by the Bureau of Indian Standards on 10 January 1990, after the draft finalized by the Rubber Products Sectional Committee had been approved by toe Petroleum, Coal and Related Products Division Council. Carbon blacks are added to rubber to develop physical strength monly known as reinforcing agents. properties and are,~therefore, corn-- This standard covers the requirement of general purpose furnace carbon black which has been given the nomenclature of N-660 by American Society for Testing and Materials. This standard was first published in 1982. In this revision, Industry Reference Black ( LRB ) No. 6 has been included as reference black instead of IRB No. 4 for measuring physical properties of the Also, the requirements for loss on heating, ash content and discolouration of toluene vulcanizate. have been modified. This standard supplier. contains clauses 4.2 and 4.4 which call for-agreement between the purchaser and the For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 `Rules for rounding off numerical values ( revised )`. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. IS, 10357 : l?IPo Indian Standard GENERALPURPOSEFURNACE[GPF(N-660)] CARBON BLACK-SPECIFICATION (First Revision ) 1 SCOPE 1.1 This standard prescribes the requirements and methods of sampling and test for general purpose furnace [ GPF ( N-660 ) ] carbon black for use in rubber industry. 2 REFERENCES 2.1 The Indian Standards given in Annex A are necessary adjuncts to this standard. 3 TERMINOLOGY 3.1 For the purpose of this standard, definitions given in IS 7503 ( Parts 1 to 4 ) shall apply. 4 REQUJREMENTS 4.1 The material shall be free from foreign matter like wood, metal and fibres. 4.2 Pelletization The material shall be delivered in the pelletized form. Pellet hardness shall be controlled to such a' degree that satisfactory dispersion is obtained when compounded in standard mixing equipment as desired by the purchaser. 4.3 The material shall also comply requirements given in Table 1. 4.4 Compoundii ::, Characteristic month and year of manufacture, batch number; grade identification; and shall have grey colour as a colour code identification. Table 1 Requirements for General Purpose Furnace, { GPF ( N-660 ) ] Carbon Black ( Chuse 4.3') Requirement of Iii;;98 (1) (2) i) Iodine absorption, as mg of iodine/g of carbon black ii) Dibutyl phthalate ( DBP ) absorption ml/100 g of carbon black iii) Pour density,-g/l iv) Sieve residue, percent by mass, Max a) On45-micron IS Sieve b) $;v5cOO_micro~ IS v) Loss on heating, percent by,mass, Max vi) Ash content, percent . by mass, Max vii) Fines'content, percent by mass, Max viii) Discolouration of toluene, percent transmission, &fin 0'100 0 0'0010' 1'0 050 15 75 9 10 13 J16 Z%i to ci No: (4) 5 6 I : (3) 30 to 40 86 to 96 385 to 450 7 8 with the ( If desired by the purchaser the material may be compounded in natural rubber test recipe following the procedure given in Annex B and the properties of carbon black assessed relative to IRB No. 6. 5 PACKING AND MARKING 5.1 Packing The material shall be supplied in bags. The net mass of each bag shall be 25 f 0'5 kg., The bags shall be sha_ped to facilitate stacking in pellets by 6 SAMPLING, NUMBER Oti TESTS AND CRITERIA FOR CONFORMITY 6.1 Sampling The sampling of carbon black shall be done in" accordance with IS 7498 : 1985. 6.2 Number of Tests ana'criteria for Conformity All the characteristics of GPF carbon black given in Table 1 shall be tested on individual samples. 1 slight'ironing. 5.2 Marking The packages shall be marked with the identification of the source of manufacture, net mass, The lot shall he declared. as conforming to the requirements of the specification if all the test results of each of the individual samples satisfy the corresponding requirements. ANrnX ( chse Tit Ie technical Zinc oxide -for rubber (first revision. ) (first industry A 2.1,) REFERRED Tirle Glossary of terms used in rubber industry Basic terms Definitions revision ) of additive (first LIST OF INDIAN STANDARDS IS No. 1675 : 1971 3399 : 1973 IS No. 7503 : Part 1 : 1988 Part 2 : 1988 Part 3 : 1988 Part 4 : 1988 8483 : 1989 8851 : 1978 Methods of test for vulcanized 3400 ( Part 1 ) : 1987 rubbers: Part 1 Tensile stressstrain properties ( second revi.&%a) 4588 : 1986 7498 : 1985 \ Rubber, raw revision ) natural ( third Definitions relating to properties and testing ($rst revision ) Definitions relating to processing f jirst revision ) Dibenzothiazyl revision ) disulphide ( $W Methods of sampling and test for carbon black (f;rst revision ) Sulphur for rubber industry ANNEX B ( Clause 4.4 ) SCHEDULE B-l GENERAL B-l.1 These procedures involve .the incorporation of the black to be tested in rubber along with the necessary auxiliary agents, to -permit vulcanization, followed by testing. Along with each test black. a corresponding stock containing the Industry Reference Black No. 6 is included. The differences between the properties obtained on the reference black is simply a device to ,cancel the inevitable variations in test results which are due to minor variations between laboratories in equip ment,. materials, procedures and I ambient conditions. B-2 STANDARD NATURAL RUBBER COMPOUNDING FQRMULATION B-2.1 The standard formulation carbon black is given below: Material ~Naturalrubber grade ISNR : 5 ( see IS 4588 : 1986 ) Zinc oxide ( see IS 3399 : 1973 J for testing, FOR COMPOUNDING AND TESTING FOR PHYSICAL OF'%ARBON BLACK Material EVALUATION Parts by Mass 3 0'6 2'5 50 Stearic acid ( see IS I675 : 1975 ) Dibenzothiazyl disulphide ( see IS 8483 : 1989 ) Sulphur ( see IS 8851 : 1978 ) Carbon Black OPF ( N-660 ) B13 MIXING METHOD B-3.1 The mixing method to B-3.1.10. is given in B-3.1.1 Parts by Mass ~I00 5 2 B-3.1.1 Use a two roll laboratory mill having 150 mm outside diameter and 250 to 2&Omm workiug distance between the guides. The speed of slow rollshould be 24 + 0'5 revjmin and the friction ratio should be 1 to 1'4. Adjust and maintain roll temperature at 70 f 5°C and set mill opening 1'4. B-3.1.2 The carbon black shall be conditioned before weighing, by heating in an oven at 100 to 110°C for 1 hour. IS 10357 : 1990 B-3.1.3 Weigh the ingredients for a batch size which is 4 t&es of the-parts by mass in g given in B-2.1. B-3.1.4 Add rubber and band on mill, make two 3/4th cut from each side ( time 2'0 minutes ). B-3.1.5 Set mill opening at 1'65 mm and add stearic acid and 314th cut once each way ( time 25 minutes ). B-3.1.6 Add sulphur, accelerator, zinc oxide and make 314th cut twice each way ( time 2 minutes ). B-3.1.7 Add carbon black. Open mill gradually to maintain constant bank. 314th cut three times each way after all carbon black is in ( time 7'S minutes ). B-3.1.8 Cut stock, roll and weigh, if the mass of the mixed batch is beyond the tolerance of f0'6 percent, reject the batch ( time 1 minute ). B-3.1.9 Pass end-wise six times at 0'8 mm opening, and sheet off at 2'2 mm finished gauge ( time 2'5 minutes ). B-3.1.10 Condition the stock for 1 to 24 hours at a temperature of 27 f 2°C and cut out suitable slabs for vulcanization. B-4 VULCANIZATION B-4.1 The test pieces are vulcanized for 15 and 30 minutes at 145°C in a standard 4-cavity mould which gives sheets of dimensions 150 x 150 x 2 i) 15 min at 145°C ii) 30 min at 145T *l MPa=approx 10'2 kgf/cmg Sl mm. The curing press shall be capable of exerting a minimum pressure of 3'5 MN/ma ( approx 35 kgf/cma ) on the cavity areas of the mould during vulcanization. After vulcanization, the sheets shall be cooled immediately in water. Condition the vulcanized test slab for 16 hours to 72 hours at 27 f 2°C before testing. B-5 TESTING B-5.1 The vulcanized sheets are tested for 300 percent modulus, and tensile strength in accordance with IS 3400 ( Part 1 ) : 1987. B-6 PHYSICAL PROPERTIES B-6.1 The maximum difference in physical properties of vulcanizates containing GPF carbon black as compared to IRB No. 6 shall be as given in Table 2. Table 2 Difference in Physical Properties of Vulcanizates Containing GPF Carbon Black from IRB No. 6 ( Clause B-6.1 ) Cured No. Conditions Tensile Strength, Mti 300 Percent Modulus MPa* -20 -1.8 to t-1*0 to +1*2 MPa* -4.5 -5.0 3 Standard Mark The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised -by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity Details of conditions under which a licence for the to that standard as a further safeguard. use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. Barem of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. copyright BIS has the copyright of all its publications. No pau~of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, m the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director ( -Publications ), BIS. Revision of Indian Standards Indian Standards are reviewed periodically and revised, when necessary and amendments, if any, are issued from time to time. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition Comments on this Indian Standard may be sent to BIS giving the following reference: Dot : No. PCD 13 ( 1016) ._ Amend ,No . Date of Issue Text Affected BUR&+U OF INDIAN `y; * STANDARDS Headquarters : ./ii Manak Bhavan, 9 Bahadur Shah iafa?$irg, Telephones : 331~01 31, 331 13 75 i? Regional Offices : , New Delhi 110002 Telegrams * Manaksanstha ( Common to all OfFices ) Telephone -^ . . `$I,_: ;&, ..dd;. . Central : Manak Bhavan; NEW DELHI 110602 dur Shah Zafar Marg 331 01 31 331 13 75 37 86 62 2 1843 `n 41 29 16 6 32 92 95 Eastern : l/14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola CALCUTTA 700054 , Northern : SC0 445-446, Sector 35-C, CHANDIGARH 160036 Southern : C. I. T. Campus, IV Cross Road, MADRAS 600113 Western : Manakalaya, E9 MIDC, Marol, Andheri ( East ) BOMBAY 400093 Branches : AHMADABAD. BANGALORE. -BHOPAL. BHWBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. PATNA. TRIVANDRUM. _--._ 1,:$; ,' a:, ,. (,.% .1 :`;; Printed at PrintwLll Printers, Delhi, India NO. 1 APRIL 2003 TO IS 10357:1990 GENERAL PURPOSE FURNACE [GPF(N-660)] CARBON BLACK -- SPECIFICATION (First Reviswn ) [ Page 1, Table 1, S1 No. (i),CO12 ] -- Substitute absorption'. `hxiine adso+tion' for `Iodine AMENDMENT ( Page 1, clause 4.4, line 5 ) -- Substitute `IRB No. 7' for `IRB No. 6'. `Industry Reference Black ( Page 2, clause B-1.1, line 6 ) -- Substitute No. 7' for `Industry Reference Black No. 6'. ( Page 3, clause B-4.1, line 1 ) -- Substitute minutes'. ( Page 3, clause B-6.1, line 3 ) -- Substitute '30 minutes' for ` 15 and 30 `IRB No. 7' for `IRB No. 6'. ( Page 3, Table 2 ) -- Substitute the following for the existing: Table 2 Difference in Physical Properties of Vulcanizates Containing GPF Carbon Black from IRB No. 7 ( Clause B-6.1) Cure Conditions Tensile Stre&th Min, MPa* (1) 30 (2) 300 Percent MOIIUIUS, MPa* (3) minat 145°C -6.5 -4.95 to -1.95 *1 MPa = approximately 10.2 kgf/cd. (PCD 13) Reprography Unit, BIS, New Delhi, India